I am primarily a cyclist and a backpacker on the side. Unfortunately don't get as much time as I would like to get out and backpack.
Cyclist are familiar with arm and leg warmers. Basically these are lightly insulated sleeves and legs. It is amazing how much warmth these items can add. The beauty is that you don't need an additional full shirt or bottom to add a extra warmth. One can quickly remove the items because you don't have to remove a full item of clothing, which means you can shed insulation without removing a pack, shorts/pants, or boots (if the legs have side zippers). With the arms warmers you can easily pull them down to the wrist when hot and pull them up when cold.
Is there something like this in this market?

